SAM7S256_14 Datasheet, PDF (6/775 Pages) ATMEL Corporation – ARM-based Flash MCU

3. Signal Description
Table 3-1. Signal Description List
Signal Name
Function
Type
Active
Level
Power
VDDIN
Voltage and ADC Regulator Power Supply
Input
Power
VDDOUT
Voltage Regulator Output
Power
VDDFLASH
Flash Power Supply
Power
VDDIO
I/O Lines Power Supply
Power
VDDCORE
Core Power Supply
Power
VDDPLL
PLL
Power
GND
Ground
Ground
Clocks, Oscillators and PLLs
XIN
Main Oscillator Input
Input
XOUT
Main Oscillator Output
Output
PLLRC
PLL Filter
Input
PCK0 - PCK2
Programmable Clock Output
Output
ICE and JTAG
TCK
Test Clock
Input
TDI
Test Data In
Input
TDO
Test Data Out
Output
TMS
Test Mode Select
Input
JTAGSEL
JTAG Selection
Input
Flash Memory
ERASE
Flash and NVM Configuration Bits Erase
Command
Input
High
Reset/Test
NRST
Microcontroller Reset
I/O
Low
TST
Test Mode Select
Input
High
Debug Unit
DRXD
Debug Receive Data
Input
DTXD
Debug Transmit Data
Output
AIC
IRQ0 - IRQ1
External Interrupt Inputs
Input
FIQ
Fast Interrupt Input
Input
PIO
PA0 - PA31
Parallel IO Controller A
I/O
Comments
3.0 to 3.6V
1.85V nominal
3.0V to 3.6V
3.0V to 3.6V or 1.65V to 1.95V
1.65V to 1.95V
1.65V to 1.95V
No pull-up resistor
No pull-up resistor
No pull-up resistor
Pull-down resistor⁽¹⁾
Pull-down resistor⁽¹⁾
Open-drain with pull-Up resistor
Pull-down resistor⁽¹⁾
IRQ1 not present on SAM7S32/16
Pulled-up input at reset
PA0 - PA20 only on SAM7S32/16
SAM7S Series [DATASHEET]
6
6175M–ATARM–26-Oct-12